As a Disaster Recovery and High-Availability Consultant, I've participated in several disaster recovery exercises, for different customers in different industries, most of them large financial institutions, that are severely regulated here in Brazil ...

Currently if you use vradmin fbsync then:
Writes in SRL on the oldest Primary (not the node the takeover was run on) are converted into DM
Writes written on the new Primary (where the takover was run) which are tracked in the DCM are merged ...

Typically any storage device is accessed using a specific protocol (IDE/SCSI) device driver. The device driver deals with mechanisms to access the device and sending commands to it using the transport mechanism provided by the underlying transport or ...